Class: Unrestful::JobsController

Inherits:
ApplicationController show all
Includes:
ActionController::Live, JwtSecured, Utils
Defined in:
app/controllers/unrestful/jobs_controller.rb

Instance Method Summary collapse

Methods included from Utils

#safe_thread, #watchdog

Instance Method Details

#live ⇒ Object 



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# File 'app/controllers/unrestful/jobs_controller.rb', line 16

def live
	job = AsyncJob.new(job_id: params[:job_id])
	response.headers['Content-Type'] = 'text/event-stream'

	# this might be messy but will breakout of redis subscriptions when 
	# the app needs to be shutdown
	trap(:INT) { raise StreamInterrupted } 

	# this is to keep redis connection alive during long sessions
	ticker = safe_thread "ticker:#{job.job_id}" do
		loop { job.redis.publish("unrestful:heartbeat", 1); sleep 5 }
	end
	sender = safe_thread "sender:#{job.job_id}" do
		job.subscribe do |on|
			on.message do |chn, message|
				# we need to add a newline at the end or
				# it will get stuck in the buffer
				msg = message.end_with?("\n") ? message : "#{message}\n"
				response.stream.write msg
			end
		end
	end
	ticker.join
	sender.join
rescue Redis::TimeoutError
	# ignore this
rescue AsyncError => exc
	render json: Unrestful::FailResponse.render(exc.message, exc: exc) , status: :not_found
rescue IOError
	# ignore as this could be the client disconnecting during streaming
	job.unsubscribe if job
rescue StreamInterrupted
	job.unsubscribe if job
ensure
	ticker.kill if ticker
	sender.kill if sender
	response.stream.close
	job.close if job
end

#status ⇒ Object 



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# File 'app/controllers/unrestful/jobs_controller.rb', line 9

def status
	job = AsyncJob.new(job_id: params[:job_id])
	render(json: Unrestful::FailResponse.render("job #{job.job_id} doesn't exist"), status: :not_found) and return unless job.valid?

	render json: job.as_json
end